Edit Copies Time!

If you would like to be able to edit copies try pulling from this.

I did it largely the same way I did Works.

All the routes  about copies have been moved to `works/:workId/copy/:copyRole/<blah>` from `works/:workId/:copyRole/<blah>` (inserted `/copy` in the middle)

There's a bit more error checking in the Works controller to try and stop inconsistent stuff being put into Amber, but there may be little mistakes.  Please look for them!

There is no copy files.